[SOLVED] KDE lockscreen cannot be unlocked?

Hello Archers,

Yesterday, I installed KDE Plasma 5 on my new system and so far it is very smooth, except for that I cannot log back into my session once the screen is locked after a while of inactivity. I enter my password and it sort of unlocks for like a split second, but then it goes back to the locked screen and I have to enter my password again and again, never actually able to resume my session until I reboot.Now, when I enter the wrong password it says "Authentication Failure" as it should, but even when I enter my correct one, it doesn't let me in.

I am thinking maybe it's some polkit permissions or something like that, but then again, I just installed the fresh Plasma 5 packages yesterday and it was behaving like that from the start.Anyoone having the same/similar problems?Any ideas how to solve this?

Re: [SOLVED] KDE lockscreen cannot be unlocked?

Re: [SOLVED] KDE lockscreen cannot be unlocked?

I have the same issue. Question, MatejLach do you have the binary Nvidia driver version 349.16-1 installed? If so, roll back to 346.59-1 and report back if it continues.

@arojas this issue has plagued me for a few days and I have been able to consistently reproduce it on the Nvidia 349.16-1 driver release but it reverts to expected behaviour when running the Nvidia 346.59-1 driver release.

Re: [SOLVED] KDE lockscreen cannot be unlocked?

When you get a chance, try rolling back the driver (and utils, libgl, and if applicable the lib32 versions too). When I am on the older driver, I get no screenlocker crashes. Some other driver caused a similar issue and ended up filling my HDD a few weeks back.

Re: [SOLVED] KDE lockscreen cannot be unlocked?

Downgrading the nvidia stuff solved the problem!

gehzumteufel wrote:

When you get a chance, try rolling back the driver (and utils, libgl, and if applicable the lib32 versions too). When I am on the older driver, I get no screenlocker crashes. Some other driver caused a similar issue and ended up filling my HDD a few weeks back.

Re: [SOLVED] KDE lockscreen cannot be unlocked?

Re: [SOLVED] KDE lockscreen cannot be unlocked?

Uhm version 346.59 doesn't work for me at all. I have no screen, everything is black (same as version 340). But version 349 works fine for screen except for lock.Is there another way to solve this ? Because there are lot of versions of 346. Which one shoudl i use ?Thanks

Re: [SOLVED] KDE lockscreen cannot be unlocked?

archqt wrote:

Uhm version 346.59 doesn't work for me at all. I have no screen, everything is black (same as version 340). But version 349 works fine for screen except for lock.Is there another way to solve this ? Because there are lot of versions of 346. Which one shoudl i use ?Thanks

Re: [SOLVED] KDE lockscreen cannot be unlocked?

MatejLach wrote:

archqt wrote:

Uhm version 346.59 doesn't work for me at all. I have no screen, everything is black (same as version 340). But version 349 works fine for screen except for lock.Is there another way to solve this ? Because there are lot of versions of 346. Which one shoudl i use ?Thanks

Re: [SOLVED] KDE lockscreen cannot be unlocked?

@archqt I think that that the proprietary blob has several issues on laptops, so most people use bumblebee(?)

Anyways, what you can do is just issue the downgrade command and there should be no need to remove the NVidia package first, as it will ask you if you want to downgrade.

If this does not work for you, then I guess the only other option right now is to disable the screen lock by going into System Settings > Desktop Behaviour > Screen Locking and changing the "Lock screen after:" option to "Never." or trying to experiment with different NVidia drivers to see which one works.

I would also make sure that my user has all the correct permissions as well as /usr/lib/kcheckpass and polkit.

Re: [SOLVED] KDE lockscreen cannot be unlocked?

@archqt I think that that the proprietary blob has several issues on laptops, so most people use bumblebee(?)

Anyways, what you can do is just issue the downgrade command and there should be no need to remove the NVidia package first, as it will ask you if you want to downgrade.

If this does not work for you, then I guess the only other option right now is to disable the screen lock by going into System Settings > Desktop Behaviour > Screen Locking and changing the "Lock screen after:" option to "Never." or trying to experiment with different NVidia drivers to see which one works.

If i try just to do the command to downgrade packages without removing nvidia it says that there is a dependency so i had to, but maybe something is wrong.

Ok thanks. What do you mean with ?

I would also make sure that my user has all the correct permissions as well as /usr/lib/kcheckpass and polkit.

Re: [SOLVED] KDE lockscreen cannot be unlocked?

Sorry but none of those bugs are related. I will look into filing a bug with the KDE team as this seems to be related to the kscreenlocker or sddm greeter components.

archqt: Can you paste the dependency? As for the black screen, are you installing ALL the correct packages? I gave a command earlier, but here it is again for downgrading ALL nvidia video driver packages that are related to downgrading.